∞ generated and posted on 2016.01.29 ∞
Abbreviation meaning multiple species.
Multiple species as in Clostridium spp. to refer, for example, to C. botulinum, C. difficile, C. tetani, etc. See, for example, listings of normal flora presence on the human body.
The pp. is equivalent to using the construct pp. to mean multiple pages and literally is an abbreviation for "species pluralis". See also sp.